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https://github.com/dolphin-emu/dolphin.git
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beaf8138f2
Something seriously needs to be done about DSP NULL, so many lines of computation are absolutely redundant over there, since the plugin does practically nothing. git-svn-id: https://dolphin-emu.googlecode.com/svn/trunk@2006 8ced0084-cf51-0410-be5f-012b33b47a6e
113 lines
2.8 KiB
C++
113 lines
2.8 KiB
C++
// Copyright (C) 2003-2008 Dolphin Project.
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, version 2.0.
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License 2.0 for more details.
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// A copy of the GPL 2.0 should have been included with the program.
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// If not, see http://www.gnu.org/licenses/
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// Official SVN repository and contact information can be found at
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// http://code.google.com/p/dolphin-emu/
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#include "../Globals.h"
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#include "../DSPHandler.h"
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#include "UCodes.h"
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#include "UCode_ROM.h"
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CUCode_Rom::CUCode_Rom(CMailHandler& _rMailHandler)
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: IUCode(_rMailHandler)
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, m_BootTask_numSteps(0)
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, m_NextParameter(0)
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{
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DebugLog("UCode_Rom - initialized");
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m_rMailHandler.Clear();
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m_rMailHandler.PushMail(0x8071FEED);
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}
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CUCode_Rom::~CUCode_Rom()
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{}
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void CUCode_Rom::Update()
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{}
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void CUCode_Rom::HandleMail(u32 _uMail)
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{
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if (m_NextParameter == 0)
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{
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// wait for beginning of UCode
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if ((_uMail & 0xFFFF0000) != 0x80F30000)
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{
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u32 Message = 0xFEEE0000 | (_uMail & 0xFFFF);
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m_rMailHandler.PushMail(Message);
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}
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else
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{
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m_NextParameter = _uMail;
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}
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}
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else
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{
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switch (m_NextParameter)
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{
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case 0x80F3A001:
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m_CurrentUCode.m_RAMAddress = _uMail;
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break;
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case 0x80F3A002:
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m_CurrentUCode.m_Length = _uMail;
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break;
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case 0x80F3C002:
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m_CurrentUCode.m_IMEMAddress = _uMail;
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break;
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case 0x80F3B002:
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m_CurrentUCode.m_Unk = _uMail;
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break;
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case 0x80F3D001:
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{
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m_CurrentUCode.m_StartPC = _uMail;
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BootUCode();
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return; // FIXES THE OVERWRITE
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}
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break;
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}
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// THE GODDAMN OVERWRITE WAS HERE. Without the return above, since BootUCode may delete "this", well ...
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m_NextParameter = 0;
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}
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}
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void CUCode_Rom::BootUCode()
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{
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// simple non-scientific crc invented by ector :P
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// too annoying to change now, and probably good enough anyway
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u32 crc = 0;
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for (u32 i = 0; i < m_CurrentUCode.m_Length; i++)
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{
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crc ^= Memory_Read_U8(m_CurrentUCode.m_RAMAddress + i);
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//let's rol
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crc = (crc << 3) | (crc >> 29);
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}
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DebugLog("CurrentUCode SOURCE Addr: 0x%08x", m_CurrentUCode.m_RAMAddress);
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DebugLog("CurrentUCode Length: 0x%08x", m_CurrentUCode.m_Length);
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DebugLog("CurrentUCode DEST Addr: 0x%08x", m_CurrentUCode.m_IMEMAddress);
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DebugLog("CurrentUCode ???: 0x%08x", m_CurrentUCode.m_Unk);
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DebugLog("CurrentUCode init_vector: 0x%08x", m_CurrentUCode.m_StartPC);
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DebugLog("CurrentUCode CRC: 0x%08x", crc);
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DebugLog("BootTask - done");
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CDSPHandler::GetInstance().SetUCode(crc);
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}
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